Kilometer is 1000 meter units.
Kilometers to Feet Converter — km to ft
Convert Kilometer (km) to Foot (ft) using the exact conversion factor (1 kilometer = 3,280.839895 foot). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Kilometers to Feet converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A foot is exactly 0.3048 meters.
Result = input x 1000 / 0.3048.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilometers to Feet
Kilometer and Foot both measure length. Kilometer is typically associated with standard road, distance, and mapping unit in nearly every country except the United States, while Foot is typically associated with united States (height, construction, aviation altitude).
Formula
feet = kilometers × 3280.83989501
This factor comes from each unit's defined relationship to the category's base unit: 1 kilometer equals 1000 base units, and 1 foot equals 0.3048 base units, so dividing one by the other gives the direct kilometer-to-foot factor of 3280.83989501.
Simple example
1 km × 3280.839895 = 3,280.839895 ft
1 kilometer = 3,280.839895 feet.
Real-world example
10 km × 3280.839895 = 32,808.39895 ft
10 kilometers = 32,808.39895 feet.
Conversion table
| Kilometer (km) | Foot (ft) |
|---|---|
| 1 km | 3,280.839895 ft |
| 5 km | 16,404.19948 ft |
| 10 km | 32,808.39895 ft |
| 21.0975 km | 69,217.51969 ft |
| 42.195 km | 138,435.0394 ft |
| 100 km | 328,083.9895 ft |
Reverse conversion: Foot to Kilometer
1 ft × 0.0003048 = 0.0003048 km
1 foot = 0.0003048 kilometers.
kilometers = feet × 0.0003048
For a page dedicated to this direction, see Foot to Kilometer.
Kilometer vs. Foot
| Aspect | Kilometer | Foot |
|---|---|---|
| Family | SI derived (metric prefix) unit | US/imperial customary unit |
| Typical use | Road signage, speed limits, and vehicle odometers outside the US | Height measurement in the US and UK |
| Where it's used | Standard road, distance, and mapping unit in nearly every country except the United States | United States (height, construction, aviation altitude) |
Understanding the Kilometer
Kilometer (km) measures distance. A kilometer is 1,000 meters — the meter is the SI base unit of length. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard road, distance, and mapping unit in nearly every country except the United States
Uses of the Kilometer today
- Road signage, speed limits, and vehicle odometers outside the US
- Geographic and mapping distances
- Endurance sports (marathons are measured in kilometers internationally, though the marathon distance itself is a fixed value in both systems)
History of the Kilometer
The meter was defined during the French Revolutionary metric reforms as one ten-millionth of the distance from the North Pole to the Equator along a meridian through Paris. 'Kilo-' is simply the SI prefix for 1,000, making the kilometer a direct decimal multiple.
The meter itself has been redefined several times as measurement precision improved — from a physical platinum-iridium bar (1889) to a krypton-86 wavelength (1960) to its current definition (1983) as the distance light travels in a fixed fraction of a second.
Historical origin. Kilometer was not the invention of a single named person; it developed through the process described above.
Understanding the Foot
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Where it's used: United States (height, construction, aviation altitude) United Kingdom (height, some construction contexts)
Uses of the Foot today
- Height measurement in the US and UK
- US construction and real estate (square footage)
- Aviation altitude worldwide (feet remain standard even in metric countries)
History of the Foot
The foot has ancient roots (Roman 'pes', various regional English feet), standardized into the modern English foot over centuries. The international foot (exactly 0.3048 m) was fixed by the 1959 International Yard and Pound Agreement, resolving small historical differences between US and UK measurements.
Historical origin. Foot was not the invention of a single named person; it developed through the process described above.
Kilometer — sources
- BIPM — The metre (SI base unit) — Current definition and history of the meter.
Foot — sources
- NIST — International yard and pound (1959) — Fixes the modern foot at exactly 0.3048 meters.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many feet are in 1 kilometer?
1 kilometer equals 3,280.839895 feet, using the exact defined conversion factor rather than an estimate.
How do I convert kilometer to foot?
Multiply the kilometer value by 3280.839895. The converter above does this instantly to whatever precision you set.
How do I convert foot back to kilometer?
Use the reverse factor: 1 foot equals 0.0003048 kilometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilometer?
Kilometer (km) measures distance. A kilometer is 1,000 meters — the meter is the SI base unit of length. It is classified as a SI derived (metric prefix) unit.
What is a foot?
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Is the kilometer to foot conversion exact?
Yes. The international foot is defined as exactly 0.3048 meters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the kilometer still used today?
Standard road, distance, and mapping unit in nearly every country except the United States